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@kgbook
Created June 11, 2019 12:17
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#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <string>
std::string exec_cmd(std::string cmd) {
if (cmd.empty()) {
return "";
}
std::cout <<cmd <<std::endl;
auto cmd_pipe = popen(cmd.c_str(), "r");
if (nullptr == cmd_pipe) {
return "";
}
char line_str[64] = "";
if (nullptr == fgets(line_str, sizeof(line_str), cmd_pipe)) {
pclose(cmd_pipe);
return "";
}
pclose(cmd_pipe);
return line_str;
}
pid_t get_process_id(std::string proc_name) {
if (proc_name.empty()) {
return -1;
}
int base = 10;
std::string cmd = std::string("pidof -s ") + proc_name;
auto line_str = exec_cmd(cmd);
if (line_str.empty()) {
return -1;
}
return strtoul(line_str.c_str(), nullptr, base);
}
bool process_started(std::string proc_name) {
auto pid = get_process_id(proc_name);
std::cout <<"pid:" <<pid <<std::endl;
return !(pid < 0);
}
int main(int argc, char **argv) {
if (argc != 2) {
std::cout <<"usage: " <<argv[0] <<" programe" <<std::endl;
return -1;
}
std::string prog = argv[1];
if (process_started(prog)) {
std::cout <<prog <<" started!" <<std::endl;
} else {
std::cout <<prog <<" not started!" <<std::endl;
}
return 0;
}
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